3Com Corporation
		     EtherDisk Diskette for the
		       EtherLink Plus Adapter

	       Diagnostic Program Instructions Summary



Overview
--------

The diagnostic program for the EtherLink Plus adapter is designed to make sure
that the adapter is installed correctly and functioning properly in your
computer.  Three groups of diagnostic tests are available:

-  The Group 1 tests check the physical components, connectors, and circuitry
   of the adapter and require only that the adapter be installed in the
   computer.

-  The Group 2 tests check the adapter's ability to transmit data on the
   network and require that the adapter be connected to a loopback plug (coax
   version only) or to a network.

-  The Group 3 tests check the adapter's ability to correctly transmit and
   receive data over the network and require that the adapter be connected to
   a network where an echo server has been set up.

   NOTE:  If Group 3 tests are running while connected to an active network,
	  intermittent packet exchange failures may be seen before the tests
	  are done.  These failures can be avoided by running Group 3 tests
	  on an inactive network in which only the computer being tested and
	  the echo server are connected.


Starting the Diagnostic Program
-------------------------------

The computer containing the EtherLink Plus adapter to be tested must be running
DOS.  If this computer is an operating server, notify all users of the server
to save their work and log out from the network.  The diagnostic program
disrupts the normal operation of the server, and work that is not saved may
be lost.  The diagnostic tests do not function properly if you run them
after booting your system with NetBIOS installed.  Please start your computer
with a standard boot diskette which does not contain a network driver.

The diagnostic program can be found in the root directory on the EtherDisk
diskette.  Start the diagnostic program by issuing the following command:

     3C505



Help Menu
---------

If you need help while running the diagnostic program, press [F1].


Using the Diagnostic Program
----------------------------

The menus and forms that make up the diagnostic program will guide you
through testing your EtherLink Plus adapter.  The following keys can be used
during diagnostic program execution:


     Key	      Function
     ---	      --------

     [Up-arrow]       Moves highlight within menus and forms
     [Down-arrow]

     [Enter]	      Selects highlighted item
     [Return]

     [F1]	      Gives help information about the highlighted item

     [Esc]	      Returns to previous menu or form
		      Stops a test
		      Stops echo server operation


If the adapter fails the diagnostic program, see the TROUBLE.TXT file in the
\DIAG directory on the EtherDisk diskette for troubleshooting procedures.


Further Information
-------------------

For more information about the diagnostic program and how it should be used,
please refer to the EtherLink Plus Adapter Guide.  The SUPPORT.TXT file in the
\INFO directory on the EtherDisk diskette provides information about
obtaining product support for the EtherLink Plus adapter.





(%VER  Diagnostic Program Instructions Summary v2.0b)